CVE-2026-55772Network attack vector

Authorization manipulation via reserved-key type confusion

Published Jul 13, 2026 · Updated Jul 13, 2026

Type confusion in CedarJava before 2.3.6, 3.1.2 through 3.4.0, and 4.0.0 through 4.8.0 allows remote authenticated users to influence authorization. CedarMap serialization does not reject reserved single-key __entity and __extn objects, so the Rust evaluator decodes a caller-controlled record as an entity reference. Reachability requires an integrating service to place caller-controlled keys in a CedarMap and a policy to reference the value in a when or unless clause.

CVSS severity8.8
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in CedarJava before 2.3.6, 3.1.2 through 3.4.0, and 4.0.0 through 4.8.0 allows remote authenticated users to influence authorization. CedarMap serialization does not reject reserved single-key __entity and __extn objects, so the Rust evaluator decodes a caller-controlled record as an entity reference. Reachability requires an integrating service to place caller-controlled keys in a CedarMap and a policy to reference the value in a when or unless clause.

The record

CVE
CVE-2026-55772
Published
Jul 13, 2026
Updated
Jul 13, 2026
Vendor
Cedar Policy
Product
CedarJava
Classifications
CWE-843
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.3.6
  2. Affected versionversion=>= 3.1.2, < 3.4.1
  3. Affected versionversion=>= 4.0.0, < 4.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cedar Policy · CedarJavaversion=< 2.3.6; version=>= 3.1.2, < 3.4.1; version=>= 4.0.0, < 4.9.0

Published CVSS scores

8.8GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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